I was able to purchase the 2 alliance mounts on 2 separate characters. and was also able to purchase the 2 horde mounts on 2 separate characters.

I can confirm that as of date I'm posting, these mounts are not account-wide; nor are they faction-wide. Meaning which ever character learns the mount only that character can use it.

You can however purchase the mount on an alt if you have acquired the saddle and (before learning the mount) mail it over to the character you want to have it, as the "binds to battle.net account" feature is working properly.

Also the Mount (account-wide) line has been removed from the details on the live servers.

Comentario de Skuppis

This mount DID NOT turn into the horde equivelant when I purchased it off an alliance character then mailed it to a horde one. Could be a bug

Edit: Seems to be fixed in Legion. This mount transferred into the Vicious Warstrider when I mailed it to a horde character.

Comentario de Trollokdamus

Unlike other Vicious mounts, this one is actually a downgrade from the Draenor elekk model. It seems to be utilizing a Draenei Paladin elekk model - a little bit more detailed than the original TBC ones, but still far from being on par with the new Draenor elekks. Shame.